Tell us why you choose to install this Trogan with your installation package?
there’s no virus in the official notepad++ downloads from here: https://notepad-plus-plus.org/download/v7.6.1.html
it has been checked at virustotal with 68 different antivirus software, including kaspersky, norton, avast, avira, etc.
see the detailed report at: https://www.virustotal.com/#/file/704a88c4c1ca705811d88717651b2c1b4e11951fb05dab3abcac908f7199040f/detection
please also go to https://www.virustotal.com and upload the installer you used to scan it for viruses, then report back.
also report to us from where you downloaded your infected installer.